I am always surprised when these parents -- the same ones who are encouraging their children to walk to the park alone, to venture out into the woods, to play without adults around -- say things like "but we always supervise their technology use." Technology. Where even free-range parents seem to stumble.
The goals of a free-range parent are the same as those of most parents: to raise their kids to cope successfully with life, and if possible, be outrageously happy. Humans have been debating how to get your kid to be a successful adult since we began to speak. For free-range parents, the answer is autonomy and responsibility -- early and often.